L I N D
O C
# :
8384
LX8384-xx/8384A-xx/8384B-xx
5 A L
OW
D
ROPOUT
P
OSITIVE
R
E G U L AT O R S
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O VA T I O N
P
R O D U C T I O N
D
A T A
S
H E E T
DESCRIPTION
The LX8384/84A/84B Series ICs are posi-
tive regulators designed to provide 5A
output current. These regulators yield
higher efficiency than currently available
devices with all internal circuitry designed
to operate down to a 1V input-to-output
differential. In each of these products,
the dropout voltage is fully specified as
a function of load current.
Dropout is
guaranteed at a maximum of 1.3V
(8384A) and 1.5V (8384)
at maximum
output current, decreasing at lower load
currents.
In addition, on-chip trimming adjusts
the reference voltage tolerance to 1%
maximum at room temperature and
2%
maximum over the 0 to 125擄C range
for the LX8384A, making this ideal for
the Pentium P54C-VRE specification.
The LX8384B offers 0.8% tolerance at
room temperature and 1.0% maximum
over line, load and temperature.
Fixed versions are also available and
specified in the Available Options table
below.
The LX8384/84A/84B Series devices
are pin-compatible with earlier 3-
terminal regulators, such as the 117 series
products. While a 10碌F output capacitor
is required on both input and output of
these new devices, this capacitor is
generally included in most regulator
designs.
The LX8384/84A/84B Series quiescent
current flows into the load, thereby
increasing efficiency. This feature
constrasts with PNP regulators where up
to 10% of the output current is wasted as
quiescent current. The LX8384-xxI is
specified over the industrial temperature
range of -25擄C to 125擄C, while the
LX8384-xxC/84A-xxC/84B-xxC is
specified over the commercial range of
0擄C to 125擄C.
K E Y F E AT U R E S
s
THREE-TERMINAL ADJUSTABLE OR FIXED
OUTPUT
s
GUARANTEED < 1.3V HEADROOM AT 5A
(LX8384A-xx)
s
GUARANTEED 2.0% MAX. REFERENCE
TOLERANCE (LX8384A-xx)
s
GUARANTEED 1.0% MAX. REFERENCE
TOLERANCE (LX8384B-xx)
s
OUTPUT CURRENT OF 5A MINIMUM
p
0.015% LINE REGULATION
p
0.15% LOAD REGULATION
A P P L I C AT I O N S
s
PENTIUM
廬
PROCESSOR VRE APPLICATIONS
s
HIGH EFFICIENCY LINEAR REGULATORS
s
POST REGULATORS FOR SWITCHING POWER
SUPPLIES
s
BATTERY CHARGERS
s
CONSTANT CURRENT REGULATORS
s
CYRIX
廬
6x86
TM
s
AMD-K5
TM
IMPORTANT:
For the most current data, consult LinFinity's web site:
http://www.linfinity.com.
PRODUCT HIGHLIGHT
A
VA I L A B L E
O
P T I O N S
Part #
LX8384/84A/84B-00
LX8384/84A/84B-15
LX8384/84A/84B-33
PER
P
AR T
#
Output
Voltage
3.5V, 5A R
E G U L AT O R
Adjustable
1.5V
3.3V
5V
IN
LX8384A
ADJ
OUT
121鈩?/div>
0.1%
3.5V at 5A
1500碌F
*
5x 6MV1500GX
Sanyo
*
1500碌F
6MV1500GX
Sanyo
Other voltage options may be available 鈥?/div>
Please contact factory for details.
218
鈩?/div>
0.1%
*
Capacitors must ESR.
have < 20m鈩?Total
An application of the LX8384A for the Pentium P54C processors meeting VRE specfication.
PA C K A G E O R D E R I N F O R M AT I O N
T
A
(擄C)
Max. Ref. Max. Dropout
Accuracy
Voltage
2.0%
0 to 125
-25 to 125
2.0%
1.0%
2.0%
1.5V
1.3V
1.3V
1.5V
P
Plastic TO-220
3-pin
LX8384-xxCP
LX8384A-xxCP
LX8384B-xxCP
LX8384-xxIP
DD
Plastic TO-263
3-pin
LX8384-xxCDD
LX8384A-xxCDD
LX8384B-xxCDD
LX8384-xxIDD
Note: All surface-mount packages are available in Tape & Reel, append the letter "T" to part number.
(i.e. LX8384A-xxCDDT) "xx" refers to output voltage, please see table above.
Copyright 漏 1997
Rev. 1.9 12/97
L
IN
F
INITY
M
ICROELECTRONICS
I
NC
.
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841, 714-898-8121, F
AX
: 714-893-2570
1
1
2
3
4
5
6
7
8
